Influence of particles shape on the vertical profile of blowing snow concentration
[Departement_IRSTEA]Eaux [TR1_IRSTEA]RIVAGE International audience In alpine regions, blowing snow events strongly influence the temporal and spatial evolution of the snow cover throughout the winter season. In Antarctica, blowing snow is an essential surface mass balance process and plays a non-neg...
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HAL CCSD
2013
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Online Access: | https://hal.inrae.fr/hal-02599447 |
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ftunigrenoble:oai:HAL:hal-02599447v1 |
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Université Grenoble Alpes: HAL |
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ftunigrenoble |
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English |
topic |
COL DU LAC BLANC ANTARCTIQUE [SDE]Environmental Sciences |
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COL DU LAC BLANC ANTARCTIQUE [SDE]Environmental Sciences Vionnet, V. Trouvilliez, A. Naaim-Bouvet, F. Influence of particles shape on the vertical profile of blowing snow concentration |
topic_facet |
COL DU LAC BLANC ANTARCTIQUE [SDE]Environmental Sciences |
description |
[Departement_IRSTEA]Eaux [TR1_IRSTEA]RIVAGE International audience In alpine regions, blowing snow events strongly influence the temporal and spatial evolution of the snow cover throughout the winter season. In Antarctica, blowing snow is an essential surface mass balance process and plays a non-negligible role in the annual accumulation. The vertical profile of blowing snow concentration determines the quantity of snow transported in turbulent suspension. A power law is often used to represent this vertical profile. It serves as an analytical solution representing an equilibrium between vertical turbulent diffusion and gravitational settling. In this work, we study how the exponent of the power law depends on the type of transported particles. Vertical profiles of blowing snow concentration have been collected at the experimental site of Col du Lac Blanc (French Alps) in 2011 and 2012 and near the research station of Cap Prud’homme (Antarctica) in 2010 and 2011.We used mechanical gauges (butterfly nets) and optical devices (Snow Particles Counters). Profiles collected during blowing snow events with precipitation have been corrected to account for the contribution of snowfall. Results show that profiles collected during blowing snow without snowfall differ from the corrected profiles collected during snowfall. At a given wind speed, particles transported during snowfall have a lower settling velocity than particles transported without snowfall. This difference confirms earlier observations (Takahashi, 1985) and can be explained by the change of drag coefficient between dendritic and rounded particles. This difference pertains several hours after the end of the snowfall illustrating the fragmentation of snow grains during blowing snow events. |
author2 |
Centre national de recherches météorologiques (CNRM) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Erosion torrentielle neige et avalanches (UR ETGR (ETNA)) Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Vionnet, V. Trouvilliez, A. Naaim-Bouvet, F. |
author_facet |
Vionnet, V. Trouvilliez, A. Naaim-Bouvet, F. |
author_sort |
Vionnet, V. |
title |
Influence of particles shape on the vertical profile of blowing snow concentration |
title_short |
Influence of particles shape on the vertical profile of blowing snow concentration |
title_full |
Influence of particles shape on the vertical profile of blowing snow concentration |
title_fullStr |
Influence of particles shape on the vertical profile of blowing snow concentration |
title_full_unstemmed |
Influence of particles shape on the vertical profile of blowing snow concentration |
title_sort |
influence of particles shape on the vertical profile of blowing snow concentration |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.inrae.fr/hal-02599447 |
op_coverage |
Vienna, Austria |
genre |
Antarc* Antarctica Antarctique* |
genre_facet |
Antarc* Antarctica Antarctique* |
op_source |
Geophysical Research Abstracts EGU General Assembly https://hal.inrae.fr/hal-02599447 EGU General Assembly, Apr 2013, Vienna, Austria. pp.1 |
op_relation |
hal-02599447 https://hal.inrae.fr/hal-02599447 IRSTEA: PUB00040339 |
_version_ |
1810289787002683392 |
spelling |
ftunigrenoble:oai:HAL:hal-02599447v1 2024-09-15T17:48:30+00:00 Influence of particles shape on the vertical profile of blowing snow concentration Vionnet, V. Trouvilliez, A. Naaim-Bouvet, F. Centre national de recherches météorologiques (CNRM) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Erosion torrentielle neige et avalanches (UR ETGR (ETNA)) Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Vienna, Austria 2013-04-07 https://hal.inrae.fr/hal-02599447 en eng HAL CCSD hal-02599447 https://hal.inrae.fr/hal-02599447 IRSTEA: PUB00040339 Geophysical Research Abstracts EGU General Assembly https://hal.inrae.fr/hal-02599447 EGU General Assembly, Apr 2013, Vienna, Austria. pp.1 COL DU LAC BLANC ANTARCTIQUE [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Conference papers 2013 ftunigrenoble 2024-06-25T00:03:37Z [Departement_IRSTEA]Eaux [TR1_IRSTEA]RIVAGE International audience In alpine regions, blowing snow events strongly influence the temporal and spatial evolution of the snow cover throughout the winter season. In Antarctica, blowing snow is an essential surface mass balance process and plays a non-negligible role in the annual accumulation. The vertical profile of blowing snow concentration determines the quantity of snow transported in turbulent suspension. A power law is often used to represent this vertical profile. It serves as an analytical solution representing an equilibrium between vertical turbulent diffusion and gravitational settling. In this work, we study how the exponent of the power law depends on the type of transported particles. Vertical profiles of blowing snow concentration have been collected at the experimental site of Col du Lac Blanc (French Alps) in 2011 and 2012 and near the research station of Cap Prud’homme (Antarctica) in 2010 and 2011.We used mechanical gauges (butterfly nets) and optical devices (Snow Particles Counters). Profiles collected during blowing snow events with precipitation have been corrected to account for the contribution of snowfall. Results show that profiles collected during blowing snow without snowfall differ from the corrected profiles collected during snowfall. At a given wind speed, particles transported during snowfall have a lower settling velocity than particles transported without snowfall. This difference confirms earlier observations (Takahashi, 1985) and can be explained by the change of drag coefficient between dendritic and rounded particles. This difference pertains several hours after the end of the snowfall illustrating the fragmentation of snow grains during blowing snow events. Conference Object Antarc* Antarctica Antarctique* Université Grenoble Alpes: HAL |